Drain



Aug. 28, 1928. 1,681,981

c." F. GILBERT DRAIN Fi1ed-Feb. 9. 1921 Patented Aug. 28, 1928.

UNITED STATES CHARLES F. GILBERT, 0F ST. LOUIS, MISSOURI.

DRAIN.

Application filed February 9, 1921. Serial No. 443,638.

My invention relates to improvements in drains. especially designed for use on domestic washing machines wherein it is desirable that the discharge may be accomplished with a minimum of effort, controllable as to ilow and functionable without the employment of springs or other deteriorative operating elements.

My object is to provide a drain of simple, durable and inexpensive construction, wherein a barrel is axially aligned with the valve seat and in which a plug carrying a readily removable and replaceable valve is rotatably mounted, and which plug is provided with a helical groove for engagement with a removable projection in the barrel for the movement of the valve relative to the seat and which plug is provided further with a packing ring to prevent leakage through the barrel.

My improvements consist in the novel construction, arrangement and combination of parts as hereinafter fully, clearly and concisely setforth, definitely pointed out in my claims and illustrated by the accompanying drawings, in which Fig. 1 is a longitudinal sectional elevation of a drain embodying my improvements.

Fig. 2 is a plan view of the drain, and

Fig. 3 is van elevation of the plug.

Referring by numerals to the drawing, 4 `designates the casing, or body, having a bib 5 and a valve seat 6. As shown, the casing is of elbow shape and carries a foot flange 7 for connection with the bottom of a washing machine, but obviously the casing may vary in design for installations other than washing machines. Axially aligned with the seat 6 is a cylindrical barrel 8, preferably formedv as an integral extension of the casing and whose interior is smooth through- 'out its length. Adjacent the outer end and at diametrically opposed points the barrel is provided with threaded bores for the reception of the screws 9 whose points or inner ends project into the barrel when seated.

The numeral 10 designates a plug of cylindrical formation having means for its rotation, such as the wings 1l and provided in its exterior surface with a pair of helices 12 for engagementby the screws 9. At its innermost e-nd the plug carries the valve 13, which may be a fiber washer, removably held by a screw 14.

To prevent leakage between the barrel and plug I provide a packing means in the form of a circumferential groove l5, in the plug, and a felt washer, such as the one shown at 16, which may be of the common splitring variety, for ready replacement.

Obviously by reason of the construction shown, the various elements which are subject to wear such as the valve 13, washer 16 and screws 9, may be readily replaced when beyond service condition and that the major elements, the casing with its valve seat and the plug, are practically indestructible, not subject to deterioration by wear.

As shown in Fig. l, by solid lines, the valve is in open position, the screws 9 being at the inner limits of the helices in the plug.

A closure of the valve involves only the simple rotation of the plug through an angle of ninety degrees, in which the helices, engaged by the screws 9, move the plug axially to carry the valve to the seat.

By preference, as shown, the barrel body, next the valve seat, and the plug body, next the valve, are, respectively, enlarged and reduced, diametrically, whereby clearance is provided to render the device self-cleaning with respect to removal, by water action, of any foreign substance, such as a thread, hair, and the like, entangled about the plug.

By further preference, and as shown, the inner end of the hollow plug body is formed imperforate, the seat for the screw lel extending only partially through the plug end, whereby the valve attaching means ollers no leakage through the plug.

I claim:

l. In a drain of the class described, a casing having a smooth bore throughout its length, a hollow plug havingan imperforate end and a helix and a circumferential groove in its wall, a valve, means for detachably securing the valve to the imperforate end of the hollow plug, and a removable element adapted to project into the bore and engage in said helix in the plug.

2. In a drain of the class described, a hollow valve carrying plug having a diametrical reduction next the valve and a circumferential groove in its wall.

3. In a drain of the class described, a casing having a valve seat and a barrel having a diametrical enlargement next the seat, a valve, and a valve moving element having a circumferential groove in its wall and a diametrical reduction next the valve for coincidence at times with the enlargement in the barrel.

4. In a drain of the class described, a. caslength7 :L hollow pluglhavng an mper'orate ingy having a smooth bore throughout its end and a circumferential'groove in fs Wall length and a hollow plug having an mper and means resident in said groove adapted l0 forate end a-nd a.- Circulnferental groove in toprevent leakage between said easing and 5 its Wall. plug.

5. In a drain of the class described, a v02.1.5.-

ing having a smooth bore throughout its CHAS. F. GILBERT. 

